huntsville, alabama... ...and a research chemist, originally from charlotte, north carolina... the host of "jeopardhere is the host of "jeopardy!" -- alex trebek! k you, johnny. thank you, ladies and gentlemen. and welcome. last week, we got our tournament of champions off to a great start. three winners are waiting in the wings to come back later this week to play in the semifinals, and, of course, one week from today, we have the first day of our two-match finals, in which the winner goes home with $250,000. so, dan, kristin, and keith, a great deal at stake for you, as you know. but good luck. o work now in this quarterfinal match. here are the categories. first off... i don't know. you have an "imp"ish category to deal with. of course. alex: keith, you start us. let's do micro for $200, pl. dan. what you are right.eriodic table? nationalities?, $200. dan. what is chinese checkers? correct. nationalities?, $400. kristin? what is russian roulette? you are right. literary terms for $200, please. keith. what are letters? correct. micro for $400. n. what is alaska? you're right.